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Monitoring and Simulation Analysis of Composite Foundations on Bearing Characteristics for a High-Speed Railway

机译：高速铁路复合地基承载特性监测与仿真分析

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The methods of geogrid reinforced and CFG pile-supported foundation is a new technique for foundation treatment developed in recent years. It is the first time to be applied in high-speed railway whose design speed is 350 km/h. It consists of rigid piles, geogrids, cushion and soft soil foundation. The unity of pile, geogrid and soil bear the load together. Because of the soil arching effect, tensioned membrane effect and stress concentration. The composite foundation can not only restrict the side deformation of soft soil, but also give full play to the strength an the deformation properties of the soil, in order to effectively improve the strength of the soft soil foundation, reduce settlement of the soft foundation after reinforcement, short construction period and lower construction costs. In this paper, based on the test section of a high-speed railway line, experimental analysis and numerical simulation were used to study the action mechanism, the deformation rules and the stress distribution rules of the pile-net composite foundation.
机译：土工格栅加CFG桩支撑地基的方法是近年来发展起来的一种新的地基处理技术。这是首次应用于设计速度为350 km / h的高速铁路。它由刚性桩，土工格栅，垫层和软土地基组成。桩，土工格栅和土壤的统一共同承担着负荷。由于土拱效应，张拉膜效应和应力集中。复合地基不仅可以限制软土的侧向变形，而且可以充分发挥土的强度和变形特性，从而有效地提高软土的强度，减少软土沉降后的沉降。加固，工期短，降低施工成本。本文在高速铁路线试验段的基础上，通过实验分析和数值模拟研究了桩网复合地基的作用机理，变形规律和应力分布规律。

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